Make long select lists searchable instead of scroll-only

Users want select lists across settings and other feature setup screens to include search so they can find the right option quickly instead of scrolling through long dropdowns. As more entries are added over time, scroll-only lists become slower and harder to use, especially for teams managing large numbers of users, tags, services, or other settings options.

Why it matters: Searchable lists reduce time spent hunting through long menus and make setup work faster and less error-prone as accounts grow.